آلودگي‌ صوتي و افت شنوايي در يكي از صنايع نفت ايران‌

Noise pollution and hearing loss in oneof theoil industries in Iran

Introduction: Nowadays, noise exposure is one of the most important industrial health problems. Noise exposure can cause hearing loss and many other health problems. So, paying attention lo the noise exposure problem should be of main priority in industrial health programs. This study was conducted in an oil producing region, aimed to assess noise pollution and noise induced hearing loss. Methods: In this descriptive analytical study, study cases were working in a noise producing industry . 55 workers randomly selected as a case group and 55 persons who were working in the administrative department were selected as control group. First, the noise producing source was defined and then sound levels were measured by means of sound level definition and the hearing loss. Data analysis was by t-test and correlation between noisehearingloss factors, usingSPSSstatistical software. Results: Main noise sources were gas turbines, eompressors, diesel generators, fans and gas containing pipes. The results of noise level measurement show that noise level at workplaces is higher than threshold limit value (P